rating of ups??

1 Answers  

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Anybody know how schematic diagram for reverse power relay? RPR for generator protection

0 Answers  

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what is difference between mccb,mcb,elcb,pccb

7 Answers  

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difrence bitwin boost charge and float chargeing

1 Answers  

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how to calculate the current carrying capacity of a 25 & 16 kva distribution transformer.

2 Answers  

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1)What will be full load current for 1000kva 3 phase generator. 2)What will be full load current for 20Kva 1 phase inverter.

5 Answers  

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what is difference between 2 pole structure and 4 pole structure in transformer yard

0 Answers   Hospira,

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For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation

0 Answers  

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what are the ratings of sockets?

10 Answers   L&T,

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calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

0 Answers  

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why the oscillator doent need the ac voltage??how can it produce the ac voltage by applying the dc voltage only??

2 Answers  

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In case of salient pole alternator when number of poles are 4 or more than 4 it helps the flux wave to be sinusoid as air gap length is increased from center to tip , but if the number of poles are 2 how does the flux wave is sinusoidal?

0 Answers  

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